function bonusPoints(){
    var n="恭喜您获得5元红包！";
    var $i=$("<b>").text("+"+n);
    var x = $('#answernotice').position().top;
    var y = $('#answernotice').position().left;

    $i.css({
        top:y-20,left:x-10,
        position:"absolute",color:"#E94F06","font-size":"1em"
    });
    $("body").append($i);
    $i.animate({top:y+200,opacity:0,"font-size":"4em"},3000,function(){
        $i.remove();
    });
    stopPropagation();
}